GI 1

Question 1

Cleft lip is due to a failure of what?

Answer 1

Failure of fusion of the maxillary and medial nasal processes (formation of 1ry palate)

Question 2

Cleft palate is due to a failure of fusion of what?

Answer 2

Failure of fusion of the lateral palatine processes, the nasal septum, and/or the median palatine process (formatoin of 2ry palate). Leads to problems w/ feeding

Question 3

Orogin of the Posterior 1/3 tongue?

Answer 3

3rd and 4th arches

Question 4

Taste and sensation of posterior 1/3 tongue?

Answer 4

Glossopharyngeal n (CN IX)

Question 5

Motor for posterior 1/3 tongue

Answer 5

Hypoglossal n (CN XII)

Question 6

Origin of anterior 2/3 tongue?

Answer 6

1st arch

Question 7

Taste to anterior 2/3 tongue?

Answer 7

Facial n (CN VII)

Question 8

Sensation to anterior 2/3 tongue

Answer 8

CN V3 (trigeminal n.-mandibular branch)

Question 9

Motor to anterior 2/3 tongue

Answer 9

CN XII Hypoglossal n.

Question 10

Taste in most posterior potion of tongue?

Answer 10

Vagus n (CN X)

Question 11

Tongue Pathology

Answer 11

Glossitis. Leukoplakia-due to EBV in HIV pt. Oral thrush-Candida albicans. Oral herpes-HSV 1. Apthous ulcer-Crohn’s and Bechet.

Question 12

Salivary gland secretion stimulation-location and effect

Answer 12

Sympathetic stim from superior cervical ganglion -> thick secretions. Parasympathetics stim from CN VII and CN

Question 13

Name the 3 salivary glands and they type of secretions. Stimulation of secretions

Answer 13

Parotid-watery. Submandibular. Sublingual-mucinous. IX -> watery secretions.

Question 14

What substances does saliva contain? Functions?

Answer 14

a-amylase digest carbs. HCO3- neutralizes bacterial acids. Mucins lubricate food.

Question 15

Salivary gland pathology

Answer 15

Xerostomia-causes: Sjorgen’s, meds (antihistamines and anticholinergics). Sialolithiasis-rx chew gum. Sialoadenitis causes: Stap aureus, viridins streptococcus

Question 16

Most common salivary gland tumor and hist characteristics?

Answer 16

Plemorphic adenoma. Mesenchymal and epithelial.

Question 17

Second most common benign salivary gland tumor? Characteristics?

Answer 17

Warthin’s Tumor -benign cystic tumor w/ germinal centers.

Question 18

Most common malignant tumor of salivary gland?

Answer 18

Mucoepidermoid carcinoma

Question 19

Malignancy potential if tumor is located in parotid?

Answer 19

30%

Question 20

Malignancy potential if tumor located in subingual g?

Answer 20

70%